Water pump belt pulley press fitting and diameter measuring mechanism

Abstract

The utility model discloses a water pump belt pulley press fitting and diameter measuring mechanism which comprises a positioning base, a measuring piece and a press fitting auxiliary tool, a positioning base is used for positioning a workpiece of a belt pulley to be press-fitted, the measuring piece is fixed on the positioning base and used for measuring the diameter of the belt pulley, and the press fitting auxiliary tool is arranged above a floating type positioning base. The press-fitting assistive device is used for press-fitting the belt pulley; compared with the existing production mode, the integrated design is adopted, so that the production procedures are reduced, the production cost is reduced, and the production efficiency is improved; the automatic measuring mechanism is adopted to replace manual work, belt pulley misloading caused by material mixing and manual negligence can be avoided, it is ensured that on-line parts are qualified, and the production efficiency and the product quality can be improved.

Description

A water pump pulley press-fitting and diameter measuring mechanism Technical Field

[0001] This utility model belongs to the field of vehicle water pump manufacturing, and in particular to a water pump pulley press-fitting and diameter measuring mechanism. Background Technology

[0002] As shown in Figures 1 and 2, the water pump mainly includes: a pump casing 1, an impeller shaft 2, an impeller 3, and a pulley 4. The impeller shaft is fixed inside the pump casing, with one end fixedly connected to the impeller and the other end fixedly connected to the pulley. The pulley drives the impeller shaft, thereby causing the impeller to rotate. As shown in Figure 2, the pulley 4 is cylindrical, with a shallow groove 401 on its outer end face, a boss 402 at the center of the groove, and a shaft hole 403 on the boss.

[0003] Currently, the pulley assembly process involves pressing the pulley in first, then manually inspecting its diameter. This multi-stage manufacturing method is not conducive to reducing production costs or improving work efficiency. During production preparation, because the pulleys are uniformly assembled, there is a risk of mixing various products. Existing error prevention methods involve manually visually inspecting the pulleys to distinguish markings or diameters, which is labor-intensive and unreliable. Summary of the Invention

[0004] This utility model proposes a water pump pulley press-fitting and diameter measuring mechanism, aiming to solve the problems of low production efficiency and low detection accuracy in existing production methods.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a water pump pulley pressing and diameter measuring mechanism, characterized in that: it includes a positioning base, a measuring component and a pressing auxiliary tool, the positioning base is used to position the workpiece to be pressed into the pulley, the measuring component is fixed on the positioning base and is used to measure the diameter of the pulley, and the pressing auxiliary tool is set above the floating positioning base and is used to press into the pulley.

[0006] Further defining the above technical solution, the structure of the positioning base includes a base, a positioning pin, a support plate, a float, a pad, a positioning hole pin, and a limiting block. The positioning pin is fixed at the center of the base and is used to axially position the impeller shaft. The support plate can float up and down on the base through the float set in a matrix. The pad is fixed on the support plate. Both the pad and the support plate are provided with impeller limiting grooves corresponding to the positioning pin. The positioning hole pin and the limiting block are fixed on the positioning surface of the pad. The positioning hole pin and the limiting block cooperate to position the pump casing.

[0007] To further define the above technical solution, the structure of the measuring component includes a support and a laser sensor, with the laser sensor fixed on the support.

[0008] Further defining the above technical solution, the structure of the press-fitting auxiliary tool includes a transition connector, a rod seat, a pressure rod, a return spring, and a press-fitting head. The lower end of the transition connector is fixedly connected to the rod seat. A positioning protrusion is provided on the lower end surface of the transition connector. A positioning shallow groove is provided on the rod seat corresponding to the positioning protrusion. A rod cavity is provided at the center of the positioning shallow groove. The pressure rod can slide up and down in the rod seat. The return spring is used to return the pressure rod to its original position. The press-fitting head is fixed to the lower end of the pressure rod.

[0009] A further improvement to the above technical solution is that a boss positioning groove is provided on the lower end surface of the rod seat.

[0010] A further improvement to the above technical solution is that an oil injection hole is provided on the lower side of the rod seat, and a grease sealing ring is provided in the lower cavity of the rod seat.

[0011] Beneficial effects: 1) Compared with existing production methods, the integrated design of this utility model helps to reduce production steps, thereby reducing production costs and improving production efficiency; 2) The use of an automatic measuring mechanism to replace manual labor can avoid misinstallation of pulleys due to material mixing or human negligence, ensuring that the parts going online are qualified, which helps to improve production efficiency and product quality. Attached Figure Description

[0012] Figure 1 is a schematic diagram of a water pump in the background art.

[0013] Figure 2 is a schematic diagram of the pulley in Figure 1.

[0014] Figure 3 is a structural diagram of this utility model.

[0015] Figure 4 is a structural diagram of the positioning base in this utility model.

[0016] Figure 5 is a structural diagram of the pressure fitting auxiliary tool in this utility model.

[0017] Figure 6 is a three-dimensional view of Figure 5.

[0018] Figure 7 is a diagram showing the usage state of this utility model.

[0019] Figure 8 is a diagram showing the usage status of the positioning pin in this utility model. Detailed Implementation

[0020] As shown in Figure 3, a water pump pulley pressing and diameter measuring mechanism includes a positioning base 5, a measuring component 6, and a pressing auxiliary tool 7. The positioning base is used to position the workpiece to be pressed into the pulley. The measuring component is fixed on the positioning base and is used to measure the diameter of the pulley. The pressing auxiliary tool is set above the floating positioning base and is used to press into the pulley.

[0021] As shown in Figure 4, the structure of the positioning base 5 includes a base plate 501, a positioning pin 502, a support plate 503, a float 504, a pad 505, a positioning hole pin 506, and a limiting block 507. The base plate can be fixedly connected to the worktable of the press machine. The positioning pin is fixed at the center of the base plate and is used to axially position the impeller shaft. The support plate can float up and down on the base plate through the float set in a matrix. The pad is fixed on the support plate. The pad and the support plate are provided with open impeller limiting grooves corresponding to the positioning pins. The positioning hole pin and the limiting block are fixed on the positioning surface of the pad. The positioning hole pin and the limiting block cooperate to position the pump casing.

[0022] As shown in Figure 4, the structure of the float 504 includes a guide post 5041 and a spring 5042. The lower end of the guide post is fixedly connected to the edge of the base plate, and the spring is fitted onto the guide post. The upper end of the guide post passes through the guide hole on the edge of the support plate and is connected to the locking nut 5043. The guide post can slide and guide the support plate.

[0023] As shown in Figure 4, the structure of the measuring component 6 includes a support and a laser sensor. The laser sensor is fixed on the support and determines the diameter of the pulley by measuring distance. The overall structure is simple, the manufacturing cost is low, and the versatility is strong.

[0024] As shown in Figure 5, the structure of the press-fitting auxiliary tool 7 includes a transition connector 701, a rod seat 702, a pressure rod 703, a return spring 704, and a press-fitting head 705. The transition connector is connected to the working part of the press-fitting machine via fasteners. The lower end of the transition connector is fixedly connected to the rod seat. A positioning protrusion 706 is provided on the lower end surface of the transition connector, and a positioning shallow groove 707 is provided on the rod seat corresponding to the positioning protrusion. The positioning protrusion and the positioning shallow groove form a stop-type positioning structure, which is beneficial for improving the connection between the transition connector and the rod seat. The coaxiality of the rod is conducive to improving the pressing accuracy. A rod cavity is provided at the center of the positioning shallow groove. The upper end of the pressure rod is a limiting step. The pressure rod is limited in the rod cavity by its own limiting step. The lower end of the pressure rod passes through the rod seat and can slide up and down in the rod seat. The upper end of the return spring abuts against the positioning protrusion, and the lower end of the return spring abuts against the limiting step end of the pressure rod. The return spring realizes the automatic return of the pressure rod. The pressing head is fixed on the lower end of the pressure rod. The lower end of the rod seat can be positioned and engaged with the shallow groove end of the pulley.

[0025] As shown in Figure 6, a boss positioning groove 708 is provided on the lower end surface of the rod seat 702, which can further ensure the pressing accuracy.

[0026] As shown in Figures 5 and 6, an oil injection hole 709 is provided on the lower side of the rod seat. The oil injection hole facilitates the injection of lubricating grease into the rod cavity of the rod seat, which lubricates the pressure rod and helps to extend its service life. A grease sealing ring 710 is provided in the lower cavity of the rod seat to prevent the lubricating grease from overflowing. This structure is simple, has low production cost, is easy to maintain, and has a long service life.

[0027] The positioning base and pressing fixture in this invention adopt a floating structure, thereby achieving flexible pressing and avoiding deformation or damage caused by forced pressing. While improving assembly quality and protecting parts and equipment, it significantly enhances production efficiency and cost-effectiveness. The positioning pin and limit block are fixed to the support plate by a pad, allowing for quick replacement of the positioning pin and limit block on the positioning pump housing by removing the pad, thus achieving versatility for the floating mechanism. To achieve fully automated operation, pressure and displacement sensors are added in conjunction with a laser sensor and a PLC controller to enable automatic operation, reducing manual control and further improving production efficiency.

[0028] As shown in Figures 7 and 8, the working principle of this utility model is as follows: A water pump without a press-fitted pulley is placed on a support plate. The positioning pin on the support plate axially positions the pump casing, while the limiting block radially positions the pump casing. Simultaneously, the positioning pin axially positions the impeller shaft inside the pump casing. Finally, a pulley is fitted onto the impeller shaft. The press-fitting machine is started, and the press-fitting head descends, inserting into the shaft hole of the pulley for initial positioning. When the lower end of the rod seat is inserted into the shallow groove at the end of the pulley and the boss on the pulley end is inserted into the positioning groove of the boss at the lower end of the rod seat, the press-fitting head continues to descend to begin press-fitting. To avoid interference between the press-fitting head and the impeller shaft, during the press-fitting process, the press rod retracts into the rod seat, thereby driving the press-fitting head upward. The return spring is in a compressed state, ensuring positioning accuracy without affecting the press-fitting process. When the pulley is pressed into the appropriate size, the laser sensor is activated by the PLC controller. The relative position of the pressed workpiece and the laser sensor remains unchanged. The laser sensor starts measuring the distance between the laser sensor and the outer side of the pulley. The laser sensor feeds back the measurement result to the PLC controller, which compares the measured value with the set value and gives a judgment result. If the judgment result is qualified, the equipment completes the pressing action and returns to its original position. If the judgment result is unqualified, the PLC controller will alarm.

Claims

1. A mechanism for pressing and measuring the diameter of a water pump pulley, characterized in that: It includes a positioning base, a measuring component, and a pressing fixture. The positioning base is used to position the workpiece to be pressed onto the pulley. The measuring component is fixed on the positioning base and is used to measure the diameter of the pulley. The pressing fixture is set above the floating positioning base and is used to press onto the pulley.

2. The water pump pulley press-fitting and diameter measuring mechanism according to claim 1, characterized in that: The structure of the positioning base includes a base, a positioning pin, a support plate, a float, a pad, a positioning pin, and a limiting block. The positioning pin is fixed at the center of the base and is used to axially position the impeller shaft. The support plate can float up and down on the base through the float set in a matrix. The pad is fixed on the support plate. Both the pad and the support plate are provided with impeller limiting grooves corresponding to the positioning pins. The positioning pin and the limiting block are fixed on the positioning surface of the pad. The positioning pin and the limiting block cooperate to position the pump casing.

3. The water pump pulley press-fitting and diameter measuring mechanism according to claim 1 or 2, characterized in that: The measuring component has the following structure: it includes a support and a laser sensor, with the laser sensor fixed to the support.

4. The water pump pulley press-fitting and diameter measuring mechanism according to claim 3, characterized in that: The structure of the press-fitting auxiliary tool includes a transition connector, a rod seat, a pressure rod, a return spring, and a press-fitting head. The lower end of the transition connector is fixedly connected to the rod seat. A positioning protrusion is provided on the lower end surface of the transition connector. A positioning shallow groove is provided on the rod seat corresponding to the positioning protrusion. A rod cavity is provided at the center of the positioning shallow groove. The pressure rod can slide up and down in the rod seat. The return spring is used to return the pressure rod to its original position. The press-fitting head is fixed to the lower end of the pressure rod.

5. A water pump pulley press fit and diameter measuring mechanism as defined in claim 4 wherein: The lower end face of the rod seat is provided with a boss positioning groove.

6. The water pump pulley press fit and diameter measuring mechanism of claim 4 or 5, wherein: The rod seat has an oil injection hole on its lower side and a grease sealing ring inside its lower cavity.

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